A mix between "Intellectual" and "sex". Meaning someone who is very knowledgeable about sex.
Guy #1: I had so much fun with Stacey last night. She's so intesexual.
Guy #2: I'm so jealous, Lauren is a blonde, I had to explain what a condom was to her last night!
by Mac_&_Cheese July 22, 2011
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Dude, I never knew Sarah was so intesexual...until last Friday...
by whiteyMcCrackerJack April 14, 2011
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